GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/options.cc
Date: 2025-10-26 02:35:25
Exec Total Coverage
Lines: 274 361 75.9%
Branches: 280 675 41.5%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 *
4 * Fills an internal map of key-value pairs from ASCII files in key=value
5 * style. Parameters can be overwritten. Used to read configuration from
6 * /etc/cvmfs/...
7 */
8
9
10 #include "options.h"
11
12 #include <fcntl.h>
13 #include <sys/wait.h>
14 #include <unistd.h>
15
16 #include <cassert>
17 #include <cstdio>
18 #include <cstdlib>
19 #include <utility>
20
21 #include "sanitizer.h"
22 #include "util/exception.h"
23 #include "util/logging.h"
24 #include "util/posix.h"
25 #include "util/string.h"
26
27 using namespace std; // NOLINT
28
29 #ifdef CVMFS_NAMESPACE_GUARD
30 namespace CVMFS_NAMESPACE_GUARD {
31 #endif
32
33
34 9034 static string EscapeShell(const std::string &raw) {
35
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 143389 for (unsigned i = 0, l = raw.length(); i < l; ++i) {
36
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 255488 if (!(((raw[i] >= '0') && (raw[i] <= '9'))
37
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 121076 || ((raw[i] >= 'A') && (raw[i] <= 'Z'))
38
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 112633 || ((raw[i] >= 'a') && (raw[i] <= 'z')) || (raw[i] == '/')
39
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 12139 || (raw[i] == ':') || (raw[i] == '.') || (raw[i] == '_')
40
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 201 || (raw[i] == '-') || (raw[i] == ','))) {
41 57 goto escape_shell_quote;
42 }
43 }
44
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 8977 return raw;
45
46 57 escape_shell_quote:
47
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 114 string result = "'";
48
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 2070 for (unsigned i = 0, l = raw.length(); i < l; ++i) {
49
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 2013 if (raw[i] == '\'')
50 ✗ result += "\\";
51
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 2013 result += raw[i];
52 }
53
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 57 result += "'";
54 57 return result;
55 }
56
57
58 10758 string OptionsManager::TrimParameter(const string &parameter) {
59 10758 string result = Trim(parameter);
60 // Strip "readonly"
61
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 10758 if (result.find("readonly ") == 0) {
62 ✗ result = result.substr(9);
63 ✗ result = Trim(result);
64
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 10758 } else if (result.find("export ") == 0) {
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 414 result = result.substr(7);
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 414 result = Trim(result);
67
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 10344 } else if (result.find("eval ") == 0) {
68 ✗ result = result.substr(5);
69 ✗ result = Trim(result);
70 }
71 10758 return result;
72 }
73
74 12000 string OptionsManager::SanitizeParameterAssignment(string *line,
75 vector<string> *tokens) {
76 12000 const size_t comment_idx = line->find("#");
77
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 12000 if (comment_idx != string::npos)
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 828 *line = line->substr(0, comment_idx);
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 12000 *line = Trim(*line);
80
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 12000 if (line->empty())
81
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 828 return "";
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 11172 *tokens = SplitString(*line, '=');
83
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 11172 if (tokens->size() < 2)
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 414 return "";
85
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 10758 string parameter = TrimParameter((*tokens)[0]);
86
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 10758 if (parameter.find(" ") != string::npos)
87 ✗ return "";
88 10758 return parameter;
89 10758 }
90
91 231 void OptionsManager::SwitchTemplateManager(
92 OptionsTemplateManager *opt_templ_mgr_param) {
93
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 231 delete opt_templ_mgr_;
94
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 231 if (opt_templ_mgr_param != NULL) {
95 231 opt_templ_mgr_ = opt_templ_mgr_param;
96 } else {
97 ✗ opt_templ_mgr_ = new OptionsTemplateManager();
98 }
99 231 for (std::map<std::string, std::string>::iterator it =
100 231 templatable_values_.begin();
101
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 342 it != templatable_values_.end();
102 111 it++) {
103
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 111 config_[it->first].value = it->second;
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 111 opt_templ_mgr_->ParseString(&(config_[it->first].value));
105
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 111 UpdateEnvironment(it->first, config_[it->first]);
106 }
107 231 }
108
109 261 bool SimpleOptionsParser::TryParsePath(const string &config_file) {
110
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 261 LogCvmfs(kLogCvmfs, kLogDebug, "Fast-parsing config file %s",
111 config_file.c_str());
112 261 string line;
113
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 261 FILE *fconfig = fopen(config_file.c_str(), "r");
114
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 261 if (fconfig == NULL)
115 29 return false;
116
117 // Read line by line and extract parameters
118
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 3596 while (GetLineFile(fconfig, &line)) {
119 3364 vector<string> tokens;
120
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 3364 const string parameter = SanitizeParameterAssignment(&line, &tokens);
121
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 3364 if (parameter.empty())
122 870 continue;
123
124 // Strip quotes from value
125
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 2494 tokens.erase(tokens.begin());
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 4988 string value = Trim(JoinStrings(tokens, "="));
127 2494 const unsigned value_length = value.length();
128
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 2494 if (value_length > 2) {
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 1972 if (((value[0] == '"') && ((value[value_length - 1] == '"')))
130
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 1972 || ((value[0] == '\'') && ((value[value_length - 1] == '\'')))) {
131
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 348 value = value.substr(1, value_length - 2);
132 }
133 }
134
135 2494 ConfigValue config_value;
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 2494 config_value.source = config_file;
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 2494 config_value.value = value;
138
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 2494 PopulateParameter(parameter, config_value);
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 4234 }
140
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 232 fclose(fconfig);
141 232 return true;
142 261 }
143
144 804 void BashOptionsManager::ParsePath(const string &config_file,
145 const bool external) {
146
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 804 LogCvmfs(kLogCvmfs, kLogDebug, "Parsing config file %s", config_file.c_str());
147 int retval;
148 int pipe_open[2];
149 int pipe_quit[2];
150 804 pid_t pid_child = 0;
151
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 804 if (external) {
152 // cvmfs can run in the process group of automount in which case
153 // autofs won't mount an additional config repository. We create a
154 // short-lived process that detaches from the process group and triggers
155 // autofs to mount the config repository, if necessary. It holds a file
156 // handle to the config file until the main process opened the file, too.
157 ✗ MakePipe(pipe_open);
158 ✗ MakePipe(pipe_quit);
159 ✗ switch (pid_child = fork()) {
160 ✗ case -1:
161 ✗ PANIC(NULL);
162 ✗ case 0: { // Child
163 ✗ close(pipe_open[0]);
164 ✗ close(pipe_quit[1]);
165 // If this is not a process group leader, create a new session
166 ✗ if (getpgrp() != getpid()) {
167 ✗ const pid_t new_session = setsid();
168 ✗ assert(new_session != (pid_t)-1);
169 }
170 ✗ (void)open(config_file.c_str(), O_RDONLY);
171 ✗ char ready = 'R';
172 ✗ WritePipe(pipe_open[1], &ready, 1);
173 ✗ retval = read(pipe_quit[0], &ready, 1);
174 ✗ _exit(retval); // Don't flush shared file descriptors
175 }
176 }
177 // Parent
178 ✗ close(pipe_open[1]);
179 ✗ close(pipe_quit[0]);
180 ✗ char ready = 0;
181 ✗ ReadPipe(pipe_open[0], &ready, 1);
182 ✗ assert(ready == 'R');
183 ✗ close(pipe_open[0]);
184 }
185
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 804 const string config_path = GetParentPath(config_file);
186
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 804 FILE *fconfig = fopen(config_file.c_str(), "r");
187
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 804 if (pid_child > 0) {
188 ✗ char c = 'C';
189 ✗ WritePipe(pipe_quit[1], &c, 1);
190 int statloc;
191 ✗ waitpid(pid_child, &statloc, 0);
192 ✗ close(pipe_quit[1]);
193 }
194
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 804 if (!fconfig) {
195
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 40 if (external && !DirectoryExists(config_path)) {
196 ✗ string repo_required;
197 ✗ if (GetValue("CVMFS_CONFIG_REPO_REQUIRED", &repo_required)
198 ✗ && IsOn(repo_required)) {
199 ✗ LogCvmfs(
200 kLogCvmfs, kLogStderr | kLogSyslogErr,
201 "required configuration repository directory does not exist: %s",
202 config_path.c_str());
203 // Do not crash as in abort(), which can trigger core file creation
204 // from the mount helper
205 ✗ exit(1);
206 }
207
208 ✗ LogCvmfs(kLogCvmfs, kLogDebug | kLogSyslogWarn,
209 "configuration repository directory does not exist: %s",
210 config_path.c_str());
211 }
212 40 return;
213 }
214
215 int fd_stdin;
216 int fd_stdout;
217 int fd_stderr;
218
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 764 retval = Shell(&fd_stdin, &fd_stdout, &fd_stderr);
219
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 764 assert(retval);
220
221 // Let the shell read the file
222 1528 string line;
223
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 1528 const string newline = "\n";
224
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 1528 const string cd = "cd \"" + ((config_path == "") ? "/" : config_path) + "\""
225
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 1528 + newline;
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 764 WritePipe(fd_stdin, cd.data(), cd.length());
227
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 9400 while (GetLineFile(fconfig, &line)) {
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 8636 WritePipe(fd_stdin, line.data(), line.length());
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 8636 WritePipe(fd_stdin, newline.data(), newline.length());
230 }
231
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 764 rewind(fconfig);
232
233 // Read line by line and extract parameters
234
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 9400 while (GetLineFile(fconfig, &line)) {
235 8636 vector<string> tokens;
236
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 8636 const string parameter = SanitizeParameterAssignment(&line, &tokens);
237
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 8636 if (parameter.empty())
238 1200 continue;
239
240 7436 ConfigValue value;
241
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 7436 value.source = config_file;
242
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 7436 const string sh_echo = "echo $" + parameter + "\n";
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 7436 WritePipe(fd_stdin, sh_echo.data(), sh_echo.length());
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 7436 GetLineFd(fd_stdout, &value.value);
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 7436 PopulateParameter(parameter, value);
246
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 9836 }
247
248
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 764 close(fd_stderr);
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 764 close(fd_stdout);
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 764 close(fd_stdin);
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 764 fclose(fconfig);
252 }
253
254
255 855 bool OptionsManager::HasConfigRepository(const string &fqrn,
256 string *config_path) {
257 855 string cvmfs_mount_dir;
258
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 855 if (!GetValue("CVMFS_MOUNT_DIR", &cvmfs_mount_dir)) {
259 ✗ LogCvmfs(kLogCvmfs, kLogDebug | kLogSyslogErr, "CVMFS_MOUNT_DIR missing");
260 ✗ return false;
261 }
262
263 855 string config_repository;
264
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 855 if (GetValue("CVMFS_CONFIG_REPOSITORY", &config_repository)) {
265
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 54 if (config_repository.empty() || (config_repository == fqrn))
266 ✗ return false;
267
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 54 const sanitizer::RepositorySanitizer repository_sanitizer;
268
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 54 if (!repository_sanitizer.IsValid(config_repository)) {
269 ✗ LogCvmfs(kLogCvmfs, kLogDebug | kLogSyslogErr,
270 "invalid CVMFS_CONFIG_REPOSITORY: %s",
271 config_repository.c_str());
272 ✗ return false;
273 }
274
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 54 *config_path = cvmfs_mount_dir + "/" + config_repository + "/etc/cvmfs/";
275 54 return true;
276 54 }
277 801 return false;
278 855 }
279
280 ✗ void OptionsManager::SetupGlobalEnvironmentParams() {
281 ✗ SetValue("CVMFS_ARCH", GetArch());
282
283 // Set CVMFS_VERSION environment variable
284 ✗ SetValue("CVMFS_VERSION", CVMFS_VERSION);
285
286 // Calculate and set CVMFS_VERSION_NUMERIC
287 // Format: major * 10000 + minor * 100 + patch
288 // Example: 2.13.2 becomes 21302
289 ✗ const int version_numeric = CVMFS_VERSION_MAJOR * 10000
290 + CVMFS_VERSION_MINOR * 100 + CVMFS_VERSION_PATCH;
291 char version_numeric_str[16];
292 ✗ snprintf(version_numeric_str, sizeof(version_numeric_str), "%d",
293 version_numeric);
294 ✗ SetValue("CVMFS_VERSION_NUMERIC", version_numeric_str);
295 }
296
297 ✗ void OptionsManager::ParseDefault(const string &fqrn) {
298 ✗ if (taint_environment_) {
299 ✗ const int retval = setenv("CVMFS_FQRN", fqrn.c_str(), 1);
300 ✗ assert(retval == 0);
301 }
302
303 ✗ SetupGlobalEnvironmentParams();
304 ✗ protected_parameters_.clear();
305 ✗ ParsePath("/etc/cvmfs/default.conf", false);
306 vector<string> dist_defaults = FindFilesBySuffix("/etc/cvmfs/default.d",
307 ✗ ".conf");
308 ✗ for (unsigned i = 0; i < dist_defaults.size(); ++i) {
309 ✗ ParsePath(dist_defaults[i], false);
310 }
311 ✗ ProtectParameter("CVMFS_CONFIG_REPOSITORY");
312 ✗ string external_config_path;
313 ✗ if ((fqrn != "") && HasConfigRepository(fqrn, &external_config_path))
314 ✗ ParsePath(external_config_path + "default.conf", true);
315 ✗ ParsePath("/etc/cvmfs/default.local", false);
316
317 ✗ if (fqrn != "") {
318 ✗ string domain;
319 ✗ vector<string> tokens = SplitString(fqrn, '.');
320 ✗ assert(tokens.size() > 1);
321 ✗ tokens.erase(tokens.begin());
322 ✗ domain = JoinStrings(tokens, ".");
323
324 ✗ if (HasConfigRepository(fqrn, &external_config_path))
325 ✗ ParsePath(external_config_path + "domain.d/" + domain + ".conf", true);
326 ✗ ParsePath("/etc/cvmfs/domain.d/" + domain + ".conf", false);
327 ✗ ParsePath("/etc/cvmfs/domain.d/" + domain + ".local", false);
328
329 ✗ if (HasConfigRepository(fqrn, &external_config_path))
330 ✗ ParsePath(external_config_path + "config.d/" + fqrn + ".conf", true);
331 ✗ ParsePath("/etc/cvmfs/config.d/" + fqrn + ".conf", false);
332 ✗ ParsePath("/etc/cvmfs/config.d/" + fqrn + ".local", false);
333 }
334 }
335
336
337 17994 void OptionsManager::PopulateParameter(const string &param, ConfigValue val) {
338
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 17994 const map<string, string>::const_iterator iter = protected_parameters_.find(
339 17994 param);
340
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 17994 if ((iter != protected_parameters_.end()) && (iter->second != val.value)) {
341
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 138 LogCvmfs(kLogCvmfs, kLogDebug | kLogSyslogErr,
342 "error in cvmfs configuration: attempt to change protected %s "
343 "from %s to %s",
344 69 param.c_str(), iter->second.c_str(), val.value.c_str());
345 69 return;
346 }
347
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 17925 ParseValue(param, &val);
348
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 17925 config_[param] = val;
349
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 17925 UpdateEnvironment(param, val);
350 }
351
352 18036 void OptionsManager::UpdateEnvironment(const string &param, ConfigValue val) {
353
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 18036 if (taint_environment_) {
354 15900 const int retval = setenv(param.c_str(), val.value.c_str(), 1);
355
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 15900 assert(retval == 0);
356 }
357 18036 }
358
359 17925 void OptionsManager::ParseValue(std::string param, ConfigValue *val) {
360
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 17925 const string orig = val->value;
361
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 17925 const bool has_templ = opt_templ_mgr_->ParseString(&(val->value));
362
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 17925 if (has_templ) {
363
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 456 templatable_values_[param] = orig;
364 }
365 17925 }
366
367
368 69 void OptionsManager::ProtectParameter(const string &param) {
369 69 string value;
370 // We don't care about the result. If param does not yet exists, we lock it
371 // to the empty string.
372
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 69 (void)GetValue(param, &value);
373
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 69 protected_parameters_[param] = value;
374 69 }
375
376
377 69 void OptionsManager::ClearConfig() { config_.clear(); }
378
379
380 8764 bool OptionsManager::IsDefined(const std::string &key) {
381
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 8764 const map<string, ConfigValue>::const_iterator iter = config_.find(key);
382 8764 return iter != config_.end();
383 }
384
385
386 98883 bool OptionsManager::GetValue(const string &key, string *value) const {
387
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 98883 const map<string, ConfigValue>::const_iterator iter = config_.find(key);
388
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 98883 if (iter != config_.end()) {
389
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 24856 *value = iter->second.value;
390 24856 return true;
391 }
392
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 74027 *value = "";
393 74027 return false;
394 }
395
396
397 105 std::string OptionsManager::GetValueOrDie(const string &key) {
398 105 std::string value;
399
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 105 const bool retval = GetValue(key, &value);
400
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 105 if (!retval) {
401 ✗ PANIC(kLogStderr | kLogDebug, "%s configuration parameter missing",
402 key.c_str());
403 }
404 105 return value;
405 }
406
407
408 9448 bool OptionsManager::GetSource(const string &key, string *value) {
409
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 9448 const map<string, ConfigValue>::const_iterator iter = config_.find(key);
410
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 9448 if (iter != config_.end()) {
411
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 9448 *value = iter->second.source;
412 9448 return true;
413 }
414 ✗ *value = "";
415 ✗ return false;
416 }
417
418
419 1857 bool OptionsManager::IsOn(const std::string &param_value) const {
420
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 1857 const string uppercase = ToUpper(param_value);
421
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 3570 return ((uppercase == "YES") || (uppercase == "ON") || (uppercase == "1")
422
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 5427 || (uppercase == "TRUE"));
423 1857 }
424
425
426 36 bool OptionsManager::IsOff(const std::string &param_value) const {
427
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 36 const string uppercase = ToUpper(param_value);
428
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 72 return ((uppercase == "NO") || (uppercase == "OFF") || (uppercase == "0")
429
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 108 || (uppercase == "FALSE"));
430 36 }
431
432
433 1616 vector<string> OptionsManager::GetAllKeys() {
434 1616 vector<string> result;
435 1616 for (map<string, ConfigValue>::const_iterator i = config_.begin(),
436 1616 iEnd = config_.end();
437
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 11616 i != iEnd;
438 10000 ++i) {
439
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 10000 result.push_back(i->first);
440 }
441 1616 return result;
442 }
443
444
445 436 vector<string> OptionsManager::GetEnvironmentSubset(const string &key_prefix,
446 bool strip_prefix) {
447 436 vector<string> result;
448 436 for (map<string, ConfigValue>::const_iterator i = config_.begin(),
449 436 iEnd = config_.end();
450
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 4300 i != iEnd;
451 3864 ++i) {
452 3864 const bool ignore_prefix = false;
453
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 3864 if (HasPrefix(i->first, key_prefix, ignore_prefix)) {
454 const string output_key = strip_prefix
455 69 ? i->first.substr(key_prefix.length())
456
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 552 : i->first;
457
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 483 result.push_back(output_key + "=" + i->second.value);
458 483 }
459 }
460 436 return result;
461 }
462
463
464 1478 string OptionsManager::Dump() {
465 1478 string result;
466
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 1478 vector<string> keys = GetAllKeys();
467
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 10512 for (unsigned i = 0, l = keys.size(); i < l; ++i) {
468 bool retval;
469 9034 string value;
470 9034 string source;
471
472
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 9034 retval = GetValue(keys[i], &value);
473
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 9034 assert(retval);
474
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 9034 retval = GetSource(keys[i], &source);
475
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 9034 assert(retval);
476
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 18068 result += keys[i] + "=" + EscapeShell(value) + " # from " + source
477
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 9034 + "\n";
478 9034 }
479 2956 return result;
480 1478 }
481
482 ✗ void OptionsManager::SetValueFromTalk(const string &key, const string &value) {
483 ✗ ConfigValue config_value;
484 ✗ config_value.source = "cvmfs_talk";
485 ✗ config_value.value = value;
486 ✗ PopulateParameter(key, config_value);
487 }
488
489 8064 void OptionsManager::SetValue(const string &key, const string &value) {
490 8064 ConfigValue config_value;
491
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 8064 config_value.source = "@INTERNAL@";
492
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 8064 config_value.value = value;
493
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 8064 PopulateParameter(key, config_value);
494 8064 }
495
496
497 528 void OptionsManager::UnsetValue(const string &key) {
498 528 protected_parameters_.erase(key);
499 528 config_.erase(key);
500
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 528 if (taint_environment_)
501 459 unsetenv(key.c_str());
502 528 }
503
504 const char *DefaultOptionsTemplateManager ::kTemplateIdentFqrn = "fqrn";
505
506 const char *DefaultOptionsTemplateManager ::kTemplateIdentOrg = "org";
507
508 712 DefaultOptionsTemplateManager::DefaultOptionsTemplateManager(std::string fqrn) {
509
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 712 SetTemplate(kTemplateIdentFqrn, fqrn);
510
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 712 vector<string> fqrn_parts = SplitString(fqrn, '.');
511
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 712 SetTemplate(kTemplateIdentOrg, fqrn_parts[0]);
512 712 }
513
514 1641 void OptionsTemplateManager::SetTemplate(std::string name, std::string val) {
515 1641 templates_[name] = val;
516 1641 }
517
518 1977 std::string OptionsTemplateManager::GetTemplate(std::string name) {
519
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 1977 if (templates_.count(name)) {
520 476 return templates_[name];
521 } else {
522
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 1501 std::string var_name = "@" + name + "@";
523
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 1501 LogCvmfs(kLogCvmfs, kLogDebug, "Undeclared variable: %s", var_name.c_str());
524 1501 return var_name;
525 1501 }
526 }
527
528 18184 bool OptionsTemplateManager::ParseString(std::string *input) {
529 18184 std::string result;
530
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 18184 std::string in = *input;
531 18184 bool has_vars = false;
532 18184 int mode = 0;
533 18184 std::string stock;
534
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 494046 for (std::string::size_type i = 0; i < in.size(); i++) {
535
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 475862 switch (mode) {
536 465271 case 0:
537
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 465271 if (in[i] == '@') {
538 2206 mode = 1;
539 } else {
540
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 463065 result += in[i];
541 }
542 465271 break;
543 10591 case 1:
544
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 10591 if (in[i] == '@') {
545 1718 mode = 0;
546
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 1718 result += GetTemplate(stock);
547
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 1718 stock = "";
548 1718 has_vars = true;
549 } else {
550
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 8873 stock += in[i];
551 }
552 10591 break;
553 }
554 }
555
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 18184 if (mode == 1) {
556
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 488 result += "@" + stock;
557 }
558
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 18184 *input = result;
559 18184 return has_vars;
560 18184 }
561
562 259 bool OptionsTemplateManager::HasTemplate(std::string name) {
563 259 return templates_.count(name);
564 }
565
566 #ifdef CVMFS_NAMESPACE_GUARD
567 } // namespace CVMFS_NAMESPACE_GUARD
568 #endif
569